Isogeny from Two Curves

isogenies

asked 2020-02-16 17:52:13 +0100

Taylor Huang
51 ●2 ●3 ●8

Hi, I was wondering given two curves $E_1,E_2$ $\ell$-isogeneous where $\ell$ is some prime. Do we have anything in Sage that help us compute its itermediate isogeny?

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rburing ( 2020-02-18 14:03:42 +0100 )edit

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answered 2021-11-03 23:01:57 +0100

Luca
890 ●6 ●21

E1.isogeny(E2, ell) works if the isogeny between E1 and E2 is a Vélu isogeny, but there is nothing for the general case.

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Asked: 2020-02-16 17:52:13 +0100

Seen: 353 times

Last updated: Nov 03 '21

Isogeny from Two Curves edit